1. A female who is usually significantly more attractive than the man she appears to be with that will flirt with him a lot and get him to spend a lot of money for the prospect of sex, and then abruptly fuck him over (in the figurative sense of course) by never talking to him again and/or dumping the shit out of him via the bulletproof lets be friends method.

Cock teases are typically thought to be the minions of a larger, more evil force.

Random Co-Worker: "So whats going on with you and Stacy?"
Stupid Sucker: "I spent 50 bucks on that cock tease and she won't even return my calls."

A cocktease is a girl that makes a guy horny, but never goes further than that becuase she is:
A) A girl that knows that a good time does not have to end in your bed.
B) Somebody that is spontaneous and friendly to everybody causing weak guys to be under the false and desperate impression that she wants more than friendship.

Tom: wow this girl is so fucking HOT. She danced with me, kissed me on the cheek, shared a drink, even let me rub her back.